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Preview questions
1. What is the mean of the following data set: 4, 8, 6, 5, 3?
5 · 6 · 4 · 7
2. In a frequency distribution, what does the term 'class interval' refer to?
Range of data · Group of values · Single value · Total frequency
3. If the median of a data set is 15 and the data set has an even number of observations, what does this indicate?
The average is 15 · The middle two numbers average to 15 · All numbers are 15 · The mode is 15
4. Which measure of central tendency is affected by extreme values?
Median · Mean · Mode · None
5. What is the mode of the data set: 2, 3, 3, 5, 7, 7, 7, 8?
3 · 5 · 7 · 8
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